冷压成型活性材料准静态压缩特性

发布时间：2018-04-09 08:23

  本文选题：活性材料　切入点：压缩特性　出处：《北京理工大学学报》2017年04期

【摘要】：采用准静态压缩实验的方法,对冷压成型PTFE/Al/W活性材料的力学特性进行了研究.基于准静态应力-应变曲线分析,得到了活性材料密度对抗压强度和杨氏模量的影响规律.结果表明,随着活性材料密度的提高,抗压强度和杨氏模量呈逐渐增大趋势,材料失效裂纹与轴线基本呈30°~45°角.进一步对准静态压缩前、后活性材料试样细观结构电镜扫描分析发现,在一定密度范围内,随着基体材料含量的减少和活性材料密度的提高,准静态压缩载荷作用下材料内部形成的力链数量随之增加,从而导致活性材料抗压强度和杨氏模量的增大.
[Abstract]:The mechanical properties of PTFE/Al/W active materials formed by cold pressing were studied by quasi static compression test.Based on the analysis of quasi-static stress-strain curves, the influence of the density of active materials on the compressive strength and Young's modulus is obtained.The results show that the compressive strength and Young's modulus increase gradually with the increase of the density of the active material, and the failure crack and the axis of the material show an angle of 30 掳to 45 掳.Before and after static compression, it was found that in a certain range of density, with the decrease of matrix material content and the increase of active material density,The number of internal force chains formed under quasi-static compression load increases, which leads to the increase of compressive strength and Young's modulus of the active materials.
【作者单位】： 北京理工大学爆炸科学与技术国家重点实验室;
【基金】：国家自然科学基金资助项目(11202030)
【分类号】：TB301
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本文编号：1725633